South Twin Sister
Weather Forecast, United States

 

Days 0-3 South Twin Sister Weather Summary:

Heavy rain (total 122mm), heaviest during Thu night. Mild temperatures (max 7°C on Thu morning, min 1°C on Sat night). Winds decreasing (fresh winds from the SSW on Fri night, calm by Sat night).

Days 3-6 South Twin Sister Weather Summary:

A light covering of new snow mostly falling on Tue morning will be washed away by heavy rain (total 50mm) on Tue night. Freeze-thaw conditions (max 5°C on Tue night, min -2°C on Sun night). Wind will be generally light.

AM PM night AM PM night AM PM night AM PM night AM PM night AM PM night
moderate rain
light rain
heavy rain
heavy rain
light rain
heavy rain
moderate rain
moderate rain
light rain
partially cloudy
partially cloudy
partially cloudy
clear
partially cloudy
snow showers
light snow
moderate rain
heavy rain
Wind km/h
15 ESE15
10 SE10
15 SSE15
10 S10
10 ESE10
25 SSE25
25 SW25
15 SW15
5 SSE5
5 NE5
5 NW5
5 NE5
5 E5
5 WSW5
5 SE5
10 SSE10
5 SSW5
5 SSE5
mod. rain light rain heavy rain heavy rain light rain heavy rain mod. rain mod. rain light rain some clouds some clouds some clouds clear some clouds snow shwrs light snow mod. rain heavy rain
Rain
Rain mm
7 5 58 12 2 17 10 7 4 - - - - - - 4 8 32
Snow
Snow cm
- - - - - - - - - - - - - - 3 4 - -
High °C
7 7 5 5 6 7 5 4 3 4 3 0 2 2 1 3 4 5
Low °C
7 7 5 5 5 5 5 3 1 2 1 -2 0 0 -1 2 4 4
Chill °C
5 5 2 2 4 2 1 0 1 2 2 -2 1 2 -3 1 2 5
Freezing level m
1850 1800 1500 1250 1400 2050 1150 1100 950 950 950 200 550 800 500 850 1400 1400
Sea lvl3000ft6000ft9000ft12000ft15000ft
mountain backdrop
-2-2-4-5-30-7-8-7-7-7-8-9-7-7-5-4-3320-202-2-3-3-3-3-4-6-5-4-100775567543430221345
Sunrise
7:54 - - 7:52 - - 7:52 - - 7:50 - - 7:50 - - 7:48 - -
Sunset
- 4:42 - - 4:44 - - 4:45 - - 4:45 - - 4:47 - - 4:50 -

Issued local time.

This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.

Live conditions reported by 5 closest weather stations

Weather StationTemp.WeatherWind
Cloud
Visibility
Cloud / Visibility
Lyman
19 km S
155m alt.
2 hours ago
8° C
Dry
2
Calm
(2 kph at 213).
Bellingham
25 km WSW
198m alt.
39 minutes ago
9° C
Dry
0
Calm
(0 kph at 270).
Deming
25 km WNW
102m alt.
3 hours ago
6° C
Dry
3
Calm
(3 kph at 103).
Bellingham
29 km W
71m alt.
44 minutes ago
11° C
Dry
3
Calm
(3 kph at 38).
Bellingham
32 km W
130m alt.
2 hours ago
-
0
Calm
(0 kph at 32).

* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones. We also include passing Ship data if it is recorded close to South Twin Sister and within an acceptable time window.